The Baltic Journal of Road and Bridge Engineering最新文献_第10页

Wood Fly Ash Stabilized Road Base Layers with High Recycled Asphalt Pavement Content 木粉煤灰稳定高再生沥青路面基层

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-06-21 DOI: 10.7250/bjrbe.2021-16.520

P. Skels, V. Haritonovs, Edvards Pavlovskis

引用次数: 3

Long-Term Performance of Pavement Structures with Cold In-Place Recycled Base Course 冷就地再生基层路面结构的长期性能研究

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-06-21 DOI: 10.7250/bjrbe.2021-16.523

A. Vaitkus, J. Gražulytė, Andrius Baltrušaitis, J. Židanavičiūtė, D. Čygas

引用次数: 5

Comparison of Road Traffic Death and Injury Rates at Pedestrian Crossings in Europe 欧洲人行横道道路交通伤亡比率的比较

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-06-21 DOI: 10.7250/bjrbe.2021-16.521

Julius Uhlmann

引用次数: 1

Cable-Stayed Bridge Loads Caused by Traffic Congestion on the Deck Measured with Bridge Monitoring System 用桥梁监测系统测量斜拉桥桥面交通拥挤引起的荷载

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-06-18 DOI: 10.7250/bjrbe.2021-16.524

C. Machelski, M. Hildebrand

{"title":"Cable-Stayed Bridge Loads Caused by Traffic Congestion on the Deck Measured with Bridge Monitoring System","authors":"C. Machelski, M. Hildebrand","doi":"10.7250/bjrbe.2021-16.524","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.524","url":null,"abstract":"Structural safety of a bridge depends, among other things, on the number of vehicles passing on its deck, their weights and distribution of loads to their axes. A large number of vehicles can accumulate on the bridge in a controlled state, i.e., during an acceptance test including load testing, and during traffic congestion on the bridge, which is a fortuitous event addressed in this paper. The paper deals with the analysis of load intensity on one bridge carriageway when it is fully and randomly filled during traffic congestion. The influence functions of the forces in the cables are used to determine the effects of loads exerted by the vehicles moving at very low speed. Effects of such loads are studied considering an exemplary cable-stayed bridge. Since the measurement basis was limited, the iterative algorithm was used. It consists in shortening the girder sections under analysis to the area appropriate for determining the load in each successive step of iteration. Ineffectiveness of the traditional algorithm, where the determined system of equations is resolved, is an important premise for using such algorithm. The results of numerical analysis show that the load intensity caused by traffic congestion is relatively high. It has been demonstrated that the matrix method may be successfully used to determine the real load of bridges on the basis of selected parameters measured in the bridge structure, also for complex scheme bridges, including the cable-stayed bridges.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"40 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120865546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Modelling of Displacement Pile Resistance in Sand Ground. Part 1: Soil Physical Model, Calibration of Model Parameters 砂土地基中位移桩阻力的数值模拟。第一部分:土壤物理模型，模型参数的标定

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-03-29 DOI: 10.7250/BJRBE.2021-16.516

V. Martinkus, A. Norkus, D. Nagrockienė

{"title":"Numerical Modelling of Displacement Pile Resistance in Sand Ground. Part 1: Soil Physical Model, Calibration of Model Parameters","authors":"V. Martinkus, A. Norkus, D. Nagrockienė","doi":"10.7250/BJRBE.2021-16.516","DOIUrl":"https://doi.org/10.7250/BJRBE.2021-16.516","url":null,"abstract":"Accuracy of numerical modelling of ground resistance of the displacement pile highly depends on proper evaluation of its states: prior loading and its changes during the loading. Evaluation of initial ground stage, its subsequent changes caused by pile installation and, finally, evolution of the loaded pile resistance are the modelling stages that require validation with specialized test results performed under controlled laboratory conditions. Selection of the proper physical soil model and its parameters should be also done in accordance with the relevant soil tests results. The first paper briefly introduces testing results of a displacement pile prototype. Tests were conducted in the created sand deposit in the laboratory pit. Determining pile resistance and ground stress-strain distribution in the vicinity of the pile allows selecting the physical model for the soil. Numerical calibration of the parameters for the physical model of the selected soil was performed. The second, following paper will introduce analyses of pile resistance. It involves creation of a discrete model and its parameters, numerical modelling of pile resistance against vertical load. The pile ground resistance modelling applying the physical model of the selected soil includes the following stages: evaluation at rest stage and assessment of residual effects of installation and displacement pile loading resistance. Numerical analyses results were validated with displacement pile prototype testing results.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122526574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact of Traffic Load Randomness on Fatigue of Steel Bridges 交通荷载随机性对钢桥疲劳的影响

The Baltic Journal of Road and Bridge Engineering Pub Date : 2020-12-23 DOI: 10.7250/bjrbe.2020-15.505

A. Wysokowski

引用次数: 3

Life Cycle Cost Analysis and Life Cycle Assessment for Road Pavement Materials and Reconstruction Technologies 道路路面材料与改造技术的全生命周期成本分析与评价

The Baltic Journal of Road and Bridge Engineering Pub Date : 2020-12-23 DOI: 10.7250/bjrbe.2020-15.510

A. Riekstiņš, V. Haritonovs, V. Straupe

{"title":"Life Cycle Cost Analysis and Life Cycle Assessment for Road Pavement Materials and Reconstruction Technologies","authors":"A. Riekstiņš, V. Haritonovs, V. Straupe","doi":"10.7250/bjrbe.2020-15.510","DOIUrl":"https://doi.org/10.7250/bjrbe.2020-15.510","url":null,"abstract":"With limited funding and a desire to reduce environmental impact, there is a lot of pressure on road Authorities to develop decision making policy to manage better, build and maintain the road network sustainability. One of the solutions is to use various life cycle analyses. Numerous tools are available for different analyses, but they usually evaluate the construction from one perspective (economical, environmental, or social). Therefore, it was decided to develop a tool, which combines economic (Life Cycle Cost Analysis) and environmental (Life Cycle Assessment) analyses. The given study presents the methodology of the self-developed calculation program, which compare full-depth road constructions. Paper also shows shortcomings when calculation does not include all life cycle processes. In this study, five different road pavement constructions and reconstruction plans were compared. The difference between these pavements was in the layer thickness, recycled asphalt content in asphalt layers and the use of cement or fly ash in the road base layers. The results showed that the full depth reclamation technology in comparison to the full-depth removal and replacement reduce emissions by 60% and costs by 50%.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124226153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Mechanistic Responses of Asphalt Concrete Overlay Over Jointed Plain Concrete Pavement Using Finite Element Method 沥青混凝土铺装层在素面混凝土节理路面上的力学响应

The Baltic Journal of Road and Bridge Engineering Pub Date : 2020-12-23 DOI: 10.7250/bjrbe.2020-15.508

A. Diallo, M. Akpınar

引用次数: 2

Case Study on the Effect of Recycled Asphalt Layer Parameters on the Bearing Capacity of the Pavement 再生沥青层参数对路面承载力影响的实例研究

The Baltic Journal of Road and Bridge Engineering Pub Date : 2020-12-23 DOI: 10.7250/bjrbe.2020-15.506

A. Zariņš

{"title":"Case Study on the Effect of Recycled Asphalt Layer Parameters on the Bearing Capacity of the Pavement","authors":"A. Zariņš","doi":"10.7250/bjrbe.2020-15.506","DOIUrl":"https://doi.org/10.7250/bjrbe.2020-15.506","url":null,"abstract":"Numerous ways to use recycled asphalt (RA) in the road base course will provide both environmental and economic benefits, allowing to recycle and utilise this initially waste material in road or pavement reconstruction projects. However, the properties and parameters of RA necessary for the application of reclaimed asphalt pavement (RAP) in a new pavement structure in most cases are not detectable in the design stage, which complicates design and construction process. The purpose of this paper is to study possibilities for evaluating the performance and parameters of RA, as well as to review the possibilities, methods and applications for RA testing. Data for this case study were obtained from recently completed road structures in the form of FWD measurements, together with lab explored parameters of drilled pavement cores. Based on that data, the relationships between the main pavement structural parameters, such as modulus on the surface of the pavement, compressive strength of RA core segment, thickness of bound layers and back calculated modulus were examined. On the way to exploring different analytical approaches, two approximation models were developed and compared, using the obtained data: by directly approximating the obtained data and after processing them with artificial neural network (ANN).","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115404438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Alternative Formula for Rigid Pavement Stress Calculation in Corner Load Conditions 角载条件下刚性路面应力计算的替代公式

The Baltic Journal of Road and Bridge Engineering Pub Date : 2020-12-23 DOI: 10.7250/bjrbe.2020-15.507

S. Olita, M. Diomedi, D. Ciampa

{"title":"Alternative Formula for Rigid Pavement Stress Calculation in Corner Load Conditions","authors":"S. Olita, M. Diomedi, D. Ciampa","doi":"10.7250/bjrbe.2020-15.507","DOIUrl":"https://doi.org/10.7250/bjrbe.2020-15.507","url":null,"abstract":"The design of rigid pavements is historically based on the classical Theory of proposed by Westergaard in 1929, which considers the rigid pavement as a thin plate resting on an elastic ground with a Winkler reaction, imposing the congruence of vertical displacements at the points of contact between the pavement structure and the ground. Westergaard’s Theory provides expressions for the calculation of maximum stress in concrete slabs for interior, edge and corner load conditions. This work focuses on the development of a Finite Element model, implemented in the ANSYS® environment and calibrated on the basis of the results of the in-scale experimental model developed by Lall and Lees in 1983. The implementation of the FE model was performed through a set of steps capable of reproducing physical and mechanical conditions of the true model, which was further intended to be used for numerical analysis. After the FE model was developed, it was possible to carry out multiple simulations pursuing three main aims: to evaluate the effect of the variation of material properties on the slab stress state, to compare the maximum stresses for the interior and edge load conditions considering Westergaard’s Theory, the experimental data and the results of the numerical model, and to use the developed and calibrated model to formulate an alternative mathematical expression, which would allow calculating the stress in corner load conditions.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121418470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3